<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>留言板</title>
    <style>
        .container {
            width: 350px;
            height: 300px;
            margin: 0 auto;
            /*水平方向居中*/
            /* border: 1px black solid; */
            text-align: center;
        }

        .grey {
            color: grey;
        }

        .container .row {
            width: 350px;
            height: 40px;

            display: flex;
            justify-content: space-between;
            align-items: center;
        }

        .container .row input {
            width: 260px;
            height: 30px;
        }

        #submit {
            width: 350px;
            height: 40px;
            background-color: orange;
            color: white;
            border: none;
            margin: 10px;
            border-radius: 5px;
            font-size: 20px;
        }
    </style>
</head>

<body>
    <div class="container">
        <h1>留言板</h1>
        <p class="grey">输入后点击提交, 会将信息显示下方空白处</p>
        <div class="row">
            <span>谁:</span> <input type="text" name="" id="from">
        </div>
        <div class="row">
            <span>对谁:</span> <input type="text" name="" id="to">
        </div>
        <div class="row">
            <span>说什么:</span> <input type="text" name="" id="say">
        </div>
        <input type="button" value="提交" id="submit" onclick="submit()">
        <!-- <div>A 对 B 说: hello</div> -->
    </div>

    <script src="js/jquery-3.7.1.min.js"></script>
    <script>
        getList();
        function getList() {
            $.ajax({
                type: "get",
                url: "/message/getList",
                success: function (messages) {
                    for (let msg of messages) {
                        let html = "<div>" + msg.from + " 对 " + msg.to + " 说: " + msg.message + "</div>";
                        $(".container").append(html);
                    }
                }
            });
        }

        function submit() {
            let from = $("#from").val();
            let to = $("#to").val();
            let say = $("#say").val();

            if (from == "" || to == "" || say == "") {
                alert("请检查输入内容");
                return;
            }
            //检验完成之后, 发起后端请求
            $.ajax({
                url: "/message/publish",
                type: "post",
                contentType: "application/json",
                data: JSON.stringify({
                    from: from,
                    to: to,
                    message: say
                }),
                success: function (result) {
                    console.log(result);
                    let o = JSON.parse(result);

                    if (o.ok == 1) {
                        //添加成功
                        alert("添加成功");
                        let html = "<div>" + from + " 对 " + to + " 说: " + say + "</div>";

                        $(".container").append(html);
                        $(":text").val("");
                    } else {
                        //失败
                        alert("添加失败");
                    }
                }

            });



        }

    </script>
</body>

</html>